#2809 Peroxiredoxins, the potential predictor of eGFR decline in patients with IgA nephropathy

Background and Aims Multiple factors may contribute to development and progression of glomerulopathies (GN), one of them is oxidative stress (OS). 2-cysteine-peroxiredoxins (PRDXs) possess the ability to reduce excessive levels of OS mediators and are crucial for cellular OS regulation. In our pilot study, we found that PRDXs 1-5 are differentially changed in patients with IgA nephropathy (IgAN), lupus nephritis (LN) and membranous nephropathy (MN). Thus, the aim of the current study was to evaluate if PRDXs 1-5 may be a prognostic marker for these 3 types of GN. Method We followed-up (5-year observation) 80 previously recruited patients with: IgAN (n = 36); MN (n = 23) and LN (n = 21). Patients were classified, based on the eGFR change (decline vs. stable and/or increase) and baseline PRDXs 1-5 levels (Table 1). The Mann Whitney-U, Kruskal-Wallis Test and Pearsons’ correlation were used for statistical analysis, the p-values <0.05 were considered significant. Results Baseline measurements indicated that the mean serum PRDXs 1-5 concentrations differ between the GN types. During the follow-up, we observed the significant association of eGFR decline with low baseline PRDX-2 level (p = 0.049) in patients with IgAN (Fig. 1). Conclusion We suggest the possible link between peroxiredoxins and deterioration of kidney function, particularly in IgAN patients.